3.7" tall 2.56 wide 5.94 long
or in metric, 9.4cm: 9.4 tall 6.5cm wide 15.1cm long
a photo of the shape/form:
https://download.schneider-electric.com/files?p_Doc_Ref=SPD_STOS-7RSR8V_FL_H&p_File_Type=rendition_369_jpg&default_image=DefaultProductImage.pngThese are the "most common computer ups batteries" with F2 male spade tabs, at least in North America but I would suspect globally. They're 4.85 or 6 lbs ( 2.19 or 2.72kg ) for 8ah and 9ah versions. I think 7s and 10ah versions "exist" but I don't see many of those and suspect lies. I suspect the higher AH ones just have thinner lead components and more of them (for more surface area.
I believe their max amp draw is 2.7 amps, and 2.1 max charging current
This data comes from a spreadsheet I have that journals a dozen or so different models of the same interchangeable battery type.
Interstate SLA1079 is one model number I have a tonne of. (perhaps literally...)
the two 12v chargers I have are Schumacher DSR118's
https://manualzz.com/doc/en/54208487/schumacher-dsr118-battery-charger-and-engine-starter-ul-104...
My other thought, is that i have two APC SMX1500 UPSes that run at 48VDC. Maybe I'd be smarter to keep all but three of these batteries actually wired into that UPSes DC bus at all times???
They will do me more good on the UPS than on a shelf right? the UPS doesn't really have the facility to charge balance, or monitor the state of individual batteries even with the expensive addon battery frames that I can't afford.
I opened it up to get the part number of the Anderson connectors it uses. And i found out that the external battery connector is just paralleled to the internal one with 10 AWG wire. And those damn anderson connectors are made of hens teeth apparently, so I decided to steal the connector from the internal battery packs that I already have in those SMXes and them to bridge the connection from Anderson to external spade connectors, and from there use WAGOs to split off into external battery strings.
I mounted the UPSes to plywood on my basement walls. Maybe photos will be coming when I get this all nice and pretty....
I bought some 30A 50v circuit breakers for cheap on amazon, and some 10AWG/30A-rated WAGOs as well for less cheap but I don't want to burn down the house.
I discovered that APC uses a 60 a fuse in their internal 48v "packs"! yikes! I plan to use 10or 15A fuses on each of my 48v packs with spade connector cables and keep the fuses out and visible, and 30A breakers on each end of the long cable that will join the ups to the battery rack since there will be power at both ends.
As far as monitoring what packs have a dud in them, I am thinking I will use my thermal cam once every couple months to look at all the fuses when idle, and during a UPS calibration (under load) and any that are super hot, or cold will get attention. And hopefully if a battery dies shorted, the current it causes will pop that 10a fuse.
For a battery cabinet, I had started to think about how to safely store all these connected batteries. I bought some 50-cal ammo boxes to wall-mount. And then I remembered that I had a Symmtra LX I wasn't using. It has 5 battery slots, with cartridges meant for this same type of battery, and I'll just drill a hole in each of those flame-retardent cartridges and run my wires out the front. They're meant to withstand meltdowns in that metal frame. One cartridge already did, years ago when I was willing to spend the money for a double-conversion ups at home. These days I prefer a standby-style ups, for power savings...
Good plan? terrible plan? better plan?